Do you want to compare Mon-El with John Constantine? Discover the powers, weakness & weapons of Mon-El and John Constantine from Mon-El Biography and John Constantine Biography. Find out all about Mon-El and John Constantine.# Check out how is Mon-El unique and distinct from John Constantine. Discover their love interest, sidekicks, family tree and the movies and games list in which Mon-El and John Constantine have appeared. Find out everything about them here!